Improvement in hydraulic lifting-jacks



between'tlese'parts.

- lliltl wf Waeseeeww JOSEPHRYA'N, QGF ST. LOUS, MISSOURI. Letters Patent No. 87,435, dated Mtl/rch 2,1869. N

The Schedule referred to in these Letters Patent and making part of the same.

To all whom tana/y concern Bel it known that I, J osnrn RYAN, of St. Louis, in the'countyl of St. Louis and State of Missouri, have made certain new and useful Improvements in Hydraulic Jacks; and I do hereby declare that the following is a full and clear description thereoiireference being had to the accompanying drawings, and to the letters of reference marked the-reon. ,y

This invention relates to an hydraulic lifting-jack, having a reservoir in combination with it, the whole machine being compaotly constructed, so as to make it a portable machine, and adapted to operate in avertical, horizontal, ordiagonal plane.

The force-pump, which actuates the lift, is contained within the reservoir, and a peculiar arrangement of the plunger-rod and valves of the said pump permits the i'luid ,from the'brcing-chamber to return to the reservoir aftereach lift.

To enable thoseskilled in the art to make and use my improved jack, I will proceed to describe its construction,and'operation.

Figure 1 of the drawings is a side elevation of one of the improved jacks..

Figure 2 is a front elevation of the same.

Figure-3 is a top plan.

Figure 4 is a sectional elevation of the Whole jack,

'and its reservoir and force-pump.

Figure 5 is a sectional elevation of the force-pump andretnrn-valve. i t

Figures 6, 7 and 8, are details of the ground-lift. Figures 9 and 10 are details of the operating-lever.

The jack or forcing-,cylinder A and the reservoir B are built upon a common base-block, C, the sub-chamber c of which connects the forcing-cylinder with the reservoir.`

The pump D is placed within the reservoir, and re ceives its supply of water, oil, o r other fluid, there# from, through the pipe (l and valve d1, and forces it out, through the valve d, into Athe sub-chamber c, from whence it passes, through the aperture c', to the forcing-chamber A, andthere ,acts upon the piston or plunger Al, to force it up, in Vthe usual manner of hydraulic presses.I The valve al* opens upward, so as to permit the duid to ilow up into and through the valveohamber d3,- and the spring (1*, above the said valve,'habitually forces it down uponjts seat.

The valve d* opens downward, and is held up to its seat by the spring d5.

The plunger Dl just fills the pump-chamber D, and thgmpacking D5 forms a perfect water-tight packing The top end of` the plunger is attached to the vi- `bratingarm D2, which ist: aiiixed to' and operated by `the square axle D3, the said` axle being operated by the adjustable lever D4, outside of the-reservoir.

The "lower end of the plunger D* is made hollow,

for the reception of the valve-plun ger d", the cavity in the said plunger D being somewhat larger than the rod d, for the purpose hereinafter described.

`The upper end of the plunger d is secured to the head-piece d?, which latter piece is large enough to lill the cavity of the plunger D, and guide the rod d een` trally therein.

An elbow at one side of the piece d? has attached to it a rod, (Z8, which reaches nearly up toy the arm D2, when the latter is in operation, and which may be depressed, as hereinafter described, and for the purpose hereafter more fully explained.

The rods d d, and the heads-piece d7, are permitted .to'slide up-and down in their bearings, the aperture through. which the head-piece el passes to the outside of the plunger-rod being sufliciently long for this purpose.

- The upper rod, als, has -two adjustable bearings, d", by means of whichyit is secured to the rod D1, and a spring, cl, so aixed to the said 'rod l5 as to hold it habitually up, and close the valve d2 (at the bottom end of the rod d6) up against its seat at the bottom of the rod D.

The upper end of the plunger-rod Dl is attached to the vibrating arm D2, by means of the wrist d2 and the bushing dm, an elastic packing, d, of India rubber, or its equivalent material, being placed in the housing of the arm D2, by the side of the bushing, for the purpose of allowing the latter to yield laterally, to accommodateV the position of the bushing to the xed axial line of the plunger D1, while the vibration ofthe said arm constantly changes the distance between the axes of the shaft D3 and the wrist d.

The lever D4, by means of which the pump is, operother side up, the absence of the screw-stop d allowj ing the outer end vof the-arm D2 to force the rods d5 d8 down, as in figs. 4 and 5, and thereby force open the valves cl2 and d, and thus allow the fluid from the cylinder A to return to the chamber B, through the said valves, and through the annular opening in the plunger D, and surrounding the rod (Z6, and theaperture formed in the side of the said rod Dl, for the passage of the head-piece all.

It should be remarked that the stern of` the valve d will be long enough to strike the bottom end of the valve d, as soon as the latter shall have started from its seat, thereby causing both of the valves l2 d to he Y opened by one and the same operation, i. e., by the de- The plunger A has a graduated scale, a, marked upon its side, so as to indicate the distance to which it is. run out of the cylinder.

A collar, al, near the top end of this plunger, receives the ground-rest A?, or the head-rest A3, or both of them together.

The grouudrest consists of a band, for surrounding the head of the plunger above the collar a, and a rod, a2, with a foot or step, a3, projecting outwardly therefrom a short distance above the base ofthe cylinder.

Near the lower end of the rod a? is secured a roller, ai, tted to the exterior surface of the cylinder A, against which it rests, and sustains the lateral thrust of the weight placed upon the foot a3.

The cylindrical part of the plunger, above the collar al, is long enough to extend above the band at the top end of the ground-rest, as is clearly shown in fig. l, for the purpose of placing the head-rest A3 thereon, if it should be desired to use both rests at the same time. f

This upper cylindrical part of the plunger has-two lugs, one on either side, j`r 1st tted to enter the notches in the restfband, as show in g. 6, and thereby prevent the turning or displacement of the parts, when the jack is under pressure.

A groove, turned in the side ofthe cylinder A, as is clearly shown in tig. 4, receives the baud A4, to which band the handles a5 are secured, the said handles affording a ready means of handling the machine.

The reservoir may be filled through the aperture closed by the screw-plug b,the said plug also extending down into `the chamber, to near the top of the vibrating arm D2, and forming an upper stop or abut. ment, against which the said arm would strike, were any of the valves or operative parts of the machine to break While the press was under strain; and the danger from such breakage would be greatly reduced by the aforesaid arrangement of the said rest b.

The adjustable rest 11 is secured to the side of the chamber B by means of the set-screw b2, and it may be used as an additional means of adjusting the stroke of the lever D4.

Having described my invention,

What I claim, is-

1. The base-block C, arranged with the sub-cham ber c, and supporting the cylinder A, in such wise that the pressure of the ram A' shall be transmitted in the line of the axis of said ram7 when combined with the reservoir B and pump D, substantially as set forth.

2. The pump D, having. valves d, d2, and d, and

hollow plunger D, arranged and operated as and for i the purpose described and set fort 3. The vibrating arm DZ, when provided with a bushing, dm, and elastic backing d, as described and shown.

4. The lever D, provided with an adjustable stop, d, in combination with the adjustable lever-rest b, when arranged as and for the purpose set forth.

5. The ground-rest A2, when provided with a step, a3, and a bearing-roller, a4, all arranged as described and shown. 6. The plunger A, when provided with ground-rest A2 and head-rest A3, as described, and for the purpose set forth.

7. Stop-guard b', when arranged with the lever D2, as and for the purpose set forth.

JOSEPH RYAN. .f Witnesses:

M. RANDOLPH, GEO. P. HERTHEL, Jr. 

